I went thrpugh that recently it started in november last year.. a fish i got from petco had something nasty ich or velvet... whatever it was fish would die in 3 days... refusing to tear down my tsnk id keep buying new fish over and over... evebtually after 3 more months of constantly seeing fish get spots and dying in a week or less i decided to bite the nullet. I took all my corals out and put them in a 20g L tsnk with all my snails and urchins.
The fish i did have left i started to do hyposalinity and copper together... I did this for a month. The copper i only did for 2 weeks though... zi got my fish i wanted slowrly and the tank was in hypo for like 2 months total.. I just recently put it back in normal salinity and put my corals in.
So far its been like 3 weeks and i havent see n anymore white spots. Cross my fingers..
I hope i never have to deal with that again.. its terrible and very expensive...
